kicks like a mule-why?

At the state shoot I found a lutic with a custom stock. It when I put it up to my shoulder the beads lined up perfectly, I didn’t have to bend my neck at all, I could stand straight up and the gun seemed to fit perfectly. The seller said I could shoot it but when I pulled the trigger it felt like someone hit me in the cheek with a hammer. That was enough for me. I then picked up another gun with a really high rib and it was the same thing, everything lined up with no fidgeting , I didn’t have to bend my neck or twist the gun at all but it kicked,, hard. So the question is why? Does having a high rib and comb make the gun jump more? The lutic even had a recoil reduction deal in the stock and it didn’t seem to help.

Just because the beads lined up,,,,doesn't mean the gun "fit" you,,,,how you mount, hold in your pocket, pressure into your pocket, stand, etc. can lead to kick and/or slap,,,,have someone that KNOWS how to "fit" you and get some ideas what you or the guns may be doing wrong